使用301实现域名跳转到www包括https的3种方法

http跳转https

    RewriteCond %{SERVER_PORT} !^443$
    RewriteRule (.*) https://%{SERVER_NAME}/$1 [R=301,L]

不带www跳转到带www

    RewriteCond %{http_host} ^demo.com [NC]
    RewriteRule ^(.*)$ http://www.demo.com/$1 [L,R=301]

带www跳转到不带www

    RewriteCond %{http_host} ^www.demo.net [NC]
    RewriteRule ^(.*)$ http://demo.net/$1 [L,R=301]

server {
		    listen       80;
		    server_name  www.example.org  example.org;
		    if ($http_host = example.org) {
		        rewrite  (.*)  http://www.example.org$1;
		    }

server {
		    listen       80;
		    server_name  example.org;
		    return       301 http://www.example.org$request_uri;
		}